Mold



C. VAUGHAN Oct. 18, 1927.

MOLD

Original Filed July 8, 1925 5 Sheets-Sheet 1 INVENTOK 5 Sheets-Sheet 2 c. VAUGHAN mom) Original Filed July 8, 1925 Oct. 18, 1927.

ATTonm-Y Oct. 18 1927'.

I C. VAUGHAN MOLD Original Filed July 8, 1925 5 Sheets-Sheet 3 Oct. 18, 1927- I VAUGHAN VMOLD Original Filed July 8, 1925 5 Sheets-Sheet 4 gnoeufo'a Z1 4 f M affoznug Oct. 18, 1927.

C. VAUGHAN MOLD Original Filed July 8, 1925 5 Sheets-Sheet 5 Ilvv y o 12 Patented Oct. 18, 1927.

' UNITED STATES 1,645,732 PATENT OFFICE.

oonm VAUGHAN, O! W, OHIO, ABSIGNOB TO THE PIR'IOLD OOIPANY, OI

, OHIO, A COBFOBATION OI OHIO.

IOLD.

' Application and July 0, me, man Io. 42,144. lama m as, new.

This invention relates to mold apparatus and particularly to permanent metal molds for casting alloys such as those having a relatively high crystallization shrinkage and 6 a relatively low freezing point.

An object of this invention is to provide a permanent mold for casting articles of a shape requiring the use. of a core and in which the core is movable downwardly out 10 of the casting cavity. 4

Another ob ect of the invention is to provide a mold particularly for casting cupshaped articles in which the mold proper comprises complementary parts movable 1 along a common support and in which a permanent core is movable upwardly into the casting cavity and downwardly out of the same whereby it is aided by gravity in freein itself from the casting. A farther object of the invention isQto provide such a mold in which a plurality of cup-shaped castings can be cast at the same time, the cores simultaneously removable and the mold sections simultaneously separable.

Another object of the invention is to pro-.

vide a permanent mold for casting a plurality of like metal objects requiring core sections for the casting of the same, said mold being'provided witheasily accessible coreoperating means,'said means serving to operatesimultaneously correspondin core sections in each of the like'metal objects to be cast.

Another object of the invention is toprovide a permanent mold in which a plurality of castings may be cast simultaneously, the metal for each of the castings being supplied from a common sprue.

A further object of my invention is to provide a permanent mold for casting a plurality of like metal objects in which a suit; able means is provided to operate certain core forming 'mechanisms or slides, said means servin also to simultaneously operate mold-locking means.

Another object of this invention is to provide a permanent-mold or casting a plurality of like metal objects wherein means is provided for simultaneously operating a plurality of eore-formmg. mechamsms and mold-locking devices.

Other objects of this invention will be apparent to those skilled in the art from the description of it hereinafter given.

In the drawings, Figure 1 is a top plan ,view of a casting apparatus.

Fig. 2 is an elevation, partly broken away, of the ap aratus.

Fig. '3 1s a vertical section on line 3-3 of ratus, showing in dotted lines the common sprue.

ings shown in Fig. 8.

Fig. 10 is a top plan view of a casting apparatus having a slightly modified form of operating means. I

Fig. 11 is an elevation of the apparatus shown in Fig. 10.

In the drawings the rigid frame 1 carries a horizontal top or bed 2 provided with longitudinal apertures 33, side ribs 4, and strips 4 extending longitudinally thereof and forming between them a slideway for a pair of separable mold sections 5, 5 which are to be held in engagement with each other to form the mold cavity and to be separated after the casting is formed. The mold sections 5, 5' are formed with recesses 6, 6' on their inner or meeting faces which extend from the bottom sections upwardly toward the top thereof and which when the sections 5, 5 are secured together form the cavity in which the casting is formed. Extending up from the recesses 6, 6' is the common sprue cavity 7 through which is poured the molten metal to feed each of the castings to be formed in the respective mold cavities. Preferably the sprue cavity is separated from the mold cavity by a constricted or gate portion 7, the molten metal thus passing from the sprue cavity through the gate portion into the mold cavity. The castings may frequently be formed without risers, but when desired, riser cavities 7 may be provided.

To center the mold sections on the supporting bed, the bed 2 is provided with bushings 8 projecting a short distance above Fig. 9 is a vertical elevation of the cast- I so that they are the bed 2 and positioned cavities when the concentric with the mold two sections 5, 5' are secured together; the sections 5, 5 being rabbcted at 9 along the lower edges of the recesses 6 to provide shoulders engaging the sides and tops of the bushings.

Slidably fitting in apertures in the bed 2 and in the bushings 8 are cores 10 adapted to be moved from a position below the top bushing up to a position within the mold cavity, the casting cavity being formed between the mold sections 5, 5 and the core 10. As is shown clearly in Fig. 6, the areas of contact between the lower portions of cores 10 and the adjacent portions of the bed 2 and bushings 8 are relatively large, whereby lateral movement of the cores 10 is prevented durin the longitudinal movement thereof. In t is manner the cores may readily be withdrawn from the casting cavities without damaging the relatively soft and fragile newly formed castings, such as of an alloy having a relatively high crystallization shrinkage and a relatively low freezing point, for example, a light alloy of alummum.

The castings 11 formed by the mold illustrated herein each consist of a cup-shaped body having a lower annular edge which forms part of the flange 12. In the present invention the flanges 12 of the castings are formed between cores 10, bushings 8, members 13 attached to the lower sections 5', 5, and portions of the mold sections 5, 5'. The fit between the members 13 and the mold sections 5, 5' is such that molten metal may not pass therebetween, thus serving as a vent and so permitting of the formation of sharper edges on the flange 12. The lower side of the flanges 12 of the castin s 11 rest on the bushing 8 so that when t e core 10 is moved downwardly as hereinafter described the casting will be held against such downward movement, the bushing thus actlng as a stripper. v

The castings 11 have rounded tops with axial apertures 14. Adjacent to the tops of the castings 11 are projections 16 having a ertures 16 and wing portions 17 with a c annel shaped portion therebetween, and piojections or bosses 18 having apertures 19.

e apertures 19 in the bosses 18 are formed by inwardly projecting core sections 20 which extend into engagement with the core 10.

I Core-forming mechanisms or slides 21 which form the channels between the wing portions 17, and apertures 16 in the proections 16 are disposed'in a slideway formed b inclined grooves in the meeting faces of t e mold sections 5, 5' and are attached to the mold section 5 by means of an undercut block 22 bolted to the mold section 5' and engaging in a slot 22 extending lengthwise of slides 21. The inner portion 23 of each slide 21 is cut to conform to the outer surface of a castin 11 and carries projecting tapered pin 24 which extends into the recess of the mold to form the aperture 16 in the projection 16. The slide 21 is rovided with a rack adapted to engage with a pinion 25 for the purpose of moving slide 21 in its groove. The pinion 25 is mounted on bar 26 which has a handle 27 for operating the same and whichhas also a pin 28 adapted to hold the mold sections 5 and 5' in immovable relation, as will be explained hereinafter. Y j

The sections 5 and 5' may be moved with respect to each other by means-of racks 29 on the lower side of the mold sections 5 and 5 and the pinions 30 mounted .on shafts 31. Levers 32 are attached to shafts 31. By means of the levers 32 the mold sections 5 and 5' can be placed, as desired, in open and in closed relation to each other.

As previously mentioned, when the mold portions 5 and 5' are placed in closed relation to each other said mold sections may be maintained immovable by the suitable engagement of pins 28 with bosses 33 of mold section 5. The locking of the mold sections may be made simultaneous with the p0siti0nmg of slides 21 within the respective mold cavities by causing shafts 26 to travel through apertures 34 of the bosses 33 and then when the mold sections are being brought into closed relation with each other, turnlngthe levers 27 so that the slides 21 will be caused to enter the mold cavities, by which same motion the pins 28 will be caused to contact with the bosses 33 in such manner that the mold sections are held in immovable relation to each other. In the modification of my invention shown in Fig. 10, the levers 27 and 27" attached to shafts 26 are shown as connected by link 27. Thus, by turning lever 27', lever 27" may also be moved, thus simultaneously rotating the shafts 26, and hence simultaneously inserting both slides into the casting cavities and operating both mold locking means. The reduction in the number of operations required to operate the mold, such as b causing the slide operating mechanism to slmultaneously lock the mold, and by simultaneously oper ating both slideoperatin mechanisms, causes appreciable saving 0 time and cost of operation.

Each of the cores 10 is hollow and is secured at its lower end to a head 34 of a rigid rod 35, there being a collar 36 at the lower part of the head on which the lower annular end of the core is supported. The

core is secured to the head by means of the Collar 37 is secured to the.

locking pin 34'. rod 35 immediately below collar 86, said 001- lar 37 actin as a stop for iting 11 Ward movement 0% the core in that it exten out- Ill III!

. erator has a pair of sockets and wardly from the rod 35 to engage the lower portion of the bed 2.

The upper end of the core 10 has a plug 44 removably secured in a central aperture in the top thereof and secured in the plug 44 is a tapered pin 45 which serves to form the axial aperture 14 in the casting.

Blocks 38 attached to extending outwardly therefrom into grooves 39 in the bed portion 2 and sliding in said grooves during movement of the cores serve to prevent the cores from lateral or rotative movement and displacement.

Racks 40 are formed on one side of each of the rods 35 and these racks mesh with an elongated pinion 41 which is journaled in opposite sides of the frame 1 and extends transversely across the frame, the shaft 42 projecting from one side of the frame and having a handle 43 by means of which it may be rotated to shift the cores into or out of the mold.

It is occasionally necessary, in order to loosen the cores from the castings, to apply more force than can be conveniently ap lied through the rack and pinion 40 an 41. Thus each of the rods 35 has its lower end below the base members 1 of the frame threaded and on the threaded ends are nuts 46. For rot-ative movement of the nuts 46 with respect to the rods 35, the nuts 46 are disposed in the collars 46 provided with sockets, as shown in Fig. 5, the said nuts and collars being so shaped that rotation of a collar 46 will cause the contained nut 46 to rotate. The collar 46 adjacent to the opin one of them is disposed an operating handle 47. The other socket in this collar receives an arm 47 which actuates the arm 47 through the connecting link 47 so that both of the rods 45 are simultaneously moved to loosen both of the cores from the casting when the operating handle 47 is turned. As soon as the cores are loosened they can be quickly lowered out of contact with the casting by turning the shaft 43.

It will be seen that by my invention I have provided means for operating a permanent mold, said means being conveniently located adjacent to the operator so that the various movements may be made quickly and with a great saving of time and effort and with a corresponding increase in production.

It will further be noted that in my improved casting apparatus I have provided a the cores 10 and mechanism for simultaneously placing cores within the mold cavity and locking the mold sections in immovable position and also for simultaneously operating the sliding core mechanisms, thereby saving time and money in operation and increasing the rate of production.

To those skilled in the art man'y modifications of and widely difiering embodiments of my invention will suggest themselves, without departing from the spirit and scope thereof. My disclosures and the descriptions herein are purely illustrative and are not intended to be in any sense limiting.

What I claim is:

1. Mold apparatus comprising a fixed support, a pair of separable permanent mold sections mounted upon this support, said sections being formed to provide sprue and casting recesses, said mold sections being provided with a sliding core' section, mechanism to move said sliding core section into place and simultaneously to lock said mold sections in immovable relation to each other.

2. Molding apparatus comprising a supporting bed having a guideway thereon and a raised mold centering portion intermediate the ends thereof, a pair of permanent mold sections slidably mounted in the guideway on opposed sides of the raised portion, longitudinal apertures in the guideway, racks mounted in the lower side of said mold sections and adapted to extend into said longitudinal apertures, pinions mounted on rods eneath said longitudinal apertures, and adapted to engage with said racks and means associated with said rods to laterally move said mold sections.

3. A molding apparatus comprising a fixed support, a pair of separable permanent mold sections mounted upon the support, said sections having formed therein sprue and casting cavities, said mold sections being provided with-movable core sections and with means to lock the mold sections together in molding position, each said core section and a locking means being arranged to be simultaneously operated by a common mechanism.

4. The invention specified in claim 3, in which mechanism is provided to simultaneously move a plurality of core sections and lock the mold sections together in immov able relation.

In testimony whereof I aflix my signature.

CONRAD VAUGHAN. 

